package thread;

import java.util.*;

public class SyncApiDemo2 {
    public static void main(String[] args) {
     //List<Integer> c = new ArrayList<>();
      // List<Integer> c = new LinkedList<>();
        //Set<Integer> c=new HashSet<>();
       // List<Integer> c=Collections.synchronizedList(new LinkedList<>());
        Set<Integer> c=Collections.synchronizedSet(new HashSet<>());
        Thread t1=new Thread(){
            public  void run(){
                for (int i = 0; i <1000 ; i++) {
                    c.add(i);

                }
            }
        };
        Thread t2=new Thread(){
            public  void run(){
                for (int i = 1000; i <2000 ; i++) {
                    c.add(i);

                }
            }
        };
        t1.start();
        t2.start();
        try {
            Thread.sleep(100);
        } catch (InterruptedException e) {

        }
        System.out.println(c.size());


    }
}
